Droppage-removing mechanism for stokers



March 9 1926 H. A. POPPENHUSEN-ET m. DROPPAGE REMOVING MECHANISM FOR STOKERS Filed April 2, 1921 3 Sheeis$heet 1 March 9 1926.,

H. A. POPPENHUSEN ET AL DROPPAGE REMOV-ING'MEGHANISM FOR STOKERS Filed April 2, 1921 3 Sheets-Sheet 2 -Marh 9 1926.

H. A. POPPENHUSEN Er AL,

DROPPAGE REMOVING MECHANISM FOR STOKBRS Filed April 2. 1921. 5 Sheets-Sheet 5 O O O ocooooooooolooooooooo o Patented Mar. 9, 1926.

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HERMAN A. POEPENHUSEN, OF IEIAIIEM'OND, INDIAITA, A1\TD ARTI UR l. STRQNG, OF CHICAGO, ILLINOIS, ASSIGN'OBS TQ GREEN ENGINEERING COMPANY, OF EAST CHICAGO, INDIANA, A COREOBATIOII {3F ILLINGISL I DROPPAGE-BEB'ZOVING MIECHANISM FOB, STOKERS.

Application filed April 2,

To all whom it may concern:

rnnrrosnn and Auriimi P. STRONG, citizens of the United States, residing, respectively, at Hammond, in the county 01 Lake and State of Indiana, and Chicago, in the county of Cook and State 01" Illinois, have invented new and useful Improvements in Droppage- Removing Mechanisms rl or Stokers, of which the following is a specification.

This invention relates to mechanisms for removing droppage from chain grate and like stokers, and consists in the matters hereinafter described and more particularly set forth in the appended claims.

In the accompanying drawings" Fig. 1 is a vertical longitudinal sectional view taken through a furnace equipped with a chain grate st cker embodying the droppage removing mechanism of our invention;

Fig. 2 is a top plan view or said mechanism, the'chain grate being omitted for the purpose 01" illustration;

Fig. 3 is a vertical sectional view taken on line 33 of Fig. 1; and

Fig. 1 is a perspective view of one or the step-shaped plates employed in the mechanism.

In Fig. 1 of the drawings, we have shown a furnace equipped with a grate of the progressive feed type, this in the instance illustrated being an endless chain grate 1. The grate 1 is indicated in conventional form and has top and bottom leads 2 and 2, which travel over and are supported by skids 3, 3 laterally spaced apart and supported by a number of cross girders secured to and carried by the side members of the grate or stoker structure. One of those girders a is at the rear end of the grate just forward 01" the rear sprocket wheel, and this girder is in the form of a flat plate, arranged vertically to extend between the top and bottom leads of the chain grate, as shown.

At a point forward of the rear girder a is located a vertically arranged plate 5 extending between the side plates 6, 6 ot the stoker structure. This plate 5 is between the top and bottom leads of the chain grate 1, and is hinged along its upper edge to a depending cross member 5 secured to the upper skids 3 and extending across the grate structure.

Between the girder 4 and the hinged plate 18'21. serial No. 458,036.

5 are a plurality of horizontally arranged plates'i", These extend between and are secured to the side plates 6 of the stoker structure, as shown. in'Fig. 8, and are posi" tioned diii'erentlevels with respect to each other, ranging from the highest level atthe rear cross girder l t0 the lowest level at the plate 5, to thus'provide a stepped floor or bottom wall for the compartment formed between the girder l, plate 5, and that portion oi' the top lead 2 ot the chain grate ex tending orer the Compartment, as shown in Fig. 1.

As illustrated in Figs. 1 and l, each plate it has along its rear edge an upwardly proecting, relatively short rib or flange 8 to make the plate step-shaped, and in front of these flanges are arranged pipes 9, 10, 11, and 12, one or each of the plates,.7. These pipes extend from one side or thestoker structure to the. other and are all closed at one end. The opposite ends of the pipes extend through th adjacent side plate 6 and there connect with a header or. main supply pipe 13, which is connected with a source of compressed air supply or steam, it the latter is to be used in lieu of air.

Each pipe 9 to 12 has in its length, within the compartment, a plurality of discharge ports or holes, all directed toward the forward end of the grate or toward the hinged plate 5. For opening the plate 5, we provide a manually operable hand lever 14 outside of the furnace, and connect it with the plate 5 by a link 15.

When the damper or plate 5 is open, as shown by dotted lines in Fig. 5, the compartment heretofore mentioned is open, and the portion of the grate 1 above the com partment is under dratt. During the operation of the stokor, it .is sometimes desirable to cut oil the draft to this area of the grate, and this is accomplished by closing the damper 5. I

During the operation of the stoker, ash or fuel slits through the top lead 2 and when over said compartment drops on the stepshaped plates 7 7. By accumulation, this droppage obstructs the flow 01"" air through the damper 5 when open, and to removethis droppage, compressed air or steam is blown into the pipes 9 to 12, inclusive, and discharged theretrom in a direction toward the out of the compartment on the lower lead of the chain, and from there the droppage sifts through into the hoppers (not shown) below and is then disposed of.

By making the floor or bottom of this compartment or chamber stepped, as shown, it is possible to blow all of the droppageout of the compartment, whether the droppage is on the topmost or the bottommost or any of the intermediate plates.

lVhile we have shown and described in detail herein a mechanism for removing droppage from stolrers, it is of course to be understood that the details of construction and arrangement of parts illustrated may be variously changed and modified without departing from the spirit and scope of our invention.

We claim as our invention:

1. The combination with an endless chain grate, of means forming a droppage collecting compartment between the top and bottom leads of said grate and adjacent the rear end of the same, said compartment being open toward said top lead and having a front opening, a damper controlling said opening, and means in said compartment for blowing droppage therefrom toward the front end of the grate and into the space between said leads when the damper is open. 7

2. The combination with an endless chain grate, of means forming a compartment adjacent the rear end of the grate between the top and bottom leads thereof and opening upward toward the top lead, a plurality of step-shaped plates forming the bottom wall of said compartment, the latter having a front opening, a damper controlling said opening, and pipes extending into said compartment in advance of the stepped portions of said plates and having discharge openings directed toward said damper.

3. The combination with an endless chain grate, of front and rear girders spaced apart of pipes arranged one in advance of each of the stepped portions of said plates, said pipes having discharge openings directed toward said damper plate.

In testimony that we claim the foregoing as our invention, we afiix our signaturesflhis' 30th day of March,'A. D. 1921.

' HERMAN A. POPPENHUSEN. ARTHUR P. STRONG. 

